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check lower pixel when top pixel ignores fog (#1808)

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Jaklyy 2023-08-12 23:38:26 -04:00 committed by GitHub
parent 5f9e7e19f3
commit f454eba3c3
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1 changed files with 19 additions and 18 deletions
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37
src/GPU3D_Soft.cpp
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@ -1423,27 +1423,28 @@ void SoftRenderer::ScanlineFinalPass(s32 y)
u32 density, srccolor, srcR, srcG, srcB, srcA;
u32 attr = AttrBuffer[pixeladdr];
if (!(attr & (1<<15))) continue;
density = CalculateFogDensity(pixeladdr);
srccolor = ColorBuffer[pixeladdr];
srcR = srccolor & 0x3F;
srcG = (srccolor >> 8) & 0x3F;
srcB = (srccolor >> 16) & 0x3F;
srcA = (srccolor >> 24) & 0x1F;
if (fogcolor)
if (attr & (1<<15))
{
srcR = ((fogR * density) + (srcR * (128-density))) >> 7;
srcG = ((fogG * density) + (srcG * (128-density))) >> 7;
srcB = ((fogB * density) + (srcB * (128-density))) >> 7;
density = CalculateFogDensity(pixeladdr);
srccolor = ColorBuffer[pixeladdr];
srcR = srccolor & 0x3F;
srcG = (srccolor >> 8) & 0x3F;
srcB = (srccolor >> 16) & 0x3F;
srcA = (srccolor >> 24) & 0x1F;
if (fogcolor)
{
srcR = ((fogR * density) + (srcR * (128-density))) >> 7;
srcG = ((fogG * density) + (srcG * (128-density))) >> 7;
srcB = ((fogB * density) + (srcB * (128-density))) >> 7;
}
srcA = ((fogA * density) + (srcA * (128-density))) >> 7;
ColorBuffer[pixeladdr] = srcR | (srcG << 8) | (srcB << 16) | (srcA << 24);
}
srcA = ((fogA * density) + (srcA * (128-density))) >> 7;
ColorBuffer[pixeladdr] = srcR | (srcG << 8) | (srcB << 16) | (srcA << 24);
// fog for lower pixel
// TODO: make this code nicer, but avoid using a loop